Features: - THIS MODERN DESIGN OFFERS THE BENEFIT OF ALLOWING THE ELBOW TO DROP WHICH RELIEVES STRESS ON BOTH SHOULDER AND WRIST.- ROCKWELL HARDNESS: 59-61 - LIFETIME WARRANTY

Rockwell: Rockwell hardness testing is a general method for measuring the hardness of metallic materials. In this test, a load is applied to set a diamond cone or a hardened steel ball in the surface of the metal. The hardness is measures by depth of the penetration